THE BONE-CAVES OF BELGIUM 33 



a Bubble-drift or Head, so that the age of the latter 

 is thus clearly shown to be later than the latest of 

 the Quaternary fluviatile deposits, and to precede 

 immediately the Alluvial deposits under which it 

 passes in the valley. 1 



It is not necessary to follow these deposits further 

 on the coast of France. Suffice to say that they exist 

 in places on the coasts of Normandy and Brittany, 

 and may be traced at intervals to the frontiers 

 of Spain. Their instructive exhibition in Guernsey 

 and Jersey will be considered in another chapter 

 (postea, p. 44). 



In the interior of France and in Belgium, we find, 

 as in England, this Drift in the form of a superficial 

 angular rubble, and of a breccia in fissures. Its 

 position with respect to the celebrated bone-caves 

 of Belgium, is particularly interesting, as it defines 

 its precise geological age with reference to such caves 

 and shows its relation to the Palaeolithic as well as to 

 Neolithic periods. These caves, of which there are 

 several in the valleys near Dinarrt, 2 are situated on 

 the steep banks of the rivers, which come down from 

 the Ardennes and flow into the Meuse, cutting deep 

 narrow valleys through the limestones and associated 

 rocks of those hills. The caves are situated at 

 various heights above the streams, and were formed 

 at different stages of the valley erosion. The Cave 

 deposits contain the bones of the various Pleistocene 



1 See Appendix D for further particulars. 



2 They are described by M. Dupont in his L'Ifomme pendant 

 les Ages de la Pierre dans les Environs de Dinant-sur-Meuse. 



D 



